[pgrouting-dev] BDSP Crashes

Razequl Islam ziboncsedu at gmail.com
Sun Jul 1 20:45:28 PDT 2012


Hi Steve,
I am trying to download the csv but ending up with 404 Not Found error.
Please confirm the URL works. I am also getting the same problem with
http://imaptools.com/dl/test.tgz

-Razequl

On Sun, Jul 1, 2012 at 7:37 PM, Stephen Woodbridge
<woodbri at swoodbridge.com>wrote:

> Razqequl,
>
> I have not looked into the reason, but my intuition it that it may be
> because this graph has about 50K edges so it will be larger than most
> anything that you generated by hand, and the edge and node numbers are very
> large because this is an extract from a 10s of million of edges graph.
> There were no error message other than the generic postgresql message the
> the server crashed. You will probably fine you have a segv in your test
> program.
>
> I can download a zipped copy of the csv file. The first row is the column
> names.
>
> http://imaptools.com/dl/bdsp-**big-bug.zip<http://imaptools.com/dl/bdsp-big-bug.zip>
>
> -Steve
>
>
> On 7/1/2012 5:18 AM, Razequl Islam wrote:
>
>> Hi Steve,
>> Bad news :(
>>
>> As I mentioned, I already have a test application to read from text
>> file, it will be very helpful if you send me a csv file containing the
>> graph. Also please let me know if there is any error message. I am
>> looking into my code for a possible reason.
>>
>> -Razequl
>>
>> On Sun, Jul 1, 2012 at 3:19 AM, Stephen Woodbridge
>> <woodbri at swoodbridge.com <mailto:woodbri at swoodbridge.**com<woodbri at swoodbridge.com>>>
>> wrote:
>>
>>     Hi Razequl,
>>
>>     I tried a larger test and it crashed the server.
>>
>>     You can test it like this:
>>
>>     # fetch a test file from my server
>>     wget http://imaptools.com/dl/test. tgz
>>     <http://imaptools.com/dl/test.**tgz<http://imaptools.com/dl/test.tgz>
>> >
>>
>>     # extract the tarfile into directory test
>>     tar xzf test.tgz
>>
>>     # load the file into your test database into table "st"
>>     shp2pgsql -s 4326 -c -D -I -N skip test/bdsp-bug.shp st | psql -U
>>     user -h localhost mydatabase
>>
>>     # get into psql or pgadmin and run the following
>>     psql -U user -h localhost mydatabase
>>     SELECT * FROM st, (
>>                    SELECT gid,the_geom
>>                      FROM bidir_dijkstra_shortest_path(
>>                        'SELECT link_id  as id,
>>                                 source::integer,
>>                                 target::integer,
>>                                 cost_time::double precision as cost ,
>>                                 rcost_time as reverse_cost
>>                           FROM st a',
>>                        1187405,
>>                        1187508,
>>                        true,
>>                        true
>>               ), st where edge_id = link_id
>>          ) as rt
>>          WHERE st.gid=rt.gid;
>>
>>     This crashes my server!
>>
>>     If you want to write a testmain.cpp, I can provide the graph data in
>>     a csv file that you could read in and pass to your code instead of
>>     the query to get the data from table st.
>>
>>     -Steve
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>>
>>
>>
>>
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